Chapter 10

Question 1

What are arthropods with very hard, crusty exoskeletons?

Answer 1

Crustaceans

Question 2

What is the substance that makes crustacean exoskeletons so hard?

Answer 2

Calcium carbonate

Question 3

What are the two body regions of crustaceans?

Answer 3

Cephalothorax and abdomen

Question 4

Which crustacean order includes many of the most familiar edible arthropods?

Answer 4

Decapoda

Question 5

What is the hard shell of decapods that provides protection for the vital organs called?

Answer 5

Carapace

Question 6

What is the forward extension of the carapace that protects the decapod’s head?

Answer 6

Rostrum

Question 7

What are the three pairs of “jaw feet” that are designed to hold food while the decapod chews?

Answer 7

Maxillipeds

Question 8

What are the structures on the underside of each abdomen segment that are used for swimming and mating?

Answer 8

Swimmerets

Question 9

What crustaceans are distinguished by having seven pairs of legs?

Answer 9

Amphipods

Question 10

What copepod has a single simple eye on top of its head?

Answer 10

Cyclops

Question 11

What is the crustacean group that breathes with gills on the flattened extensions of their legs?

Answer 11

Branchiopods

Question 12

What are the most numerous animals found in freshwater plankton?

Answer 12

Water fleas

Question 13

What is the branchiopod that lives in salty water and lacks a carapace?

Answer 13

Brine shrimp

Question 14

What is the best known cirripede?

Answer 14

Barnacles

Question 15

What shrimp-like crustacean forms a significant part of marine plankton and are some of the most vital life forms in the ocean?

Answer 15

Krill

Question 16

What are the only truly terrestrial crustaceans?

Answer 16

Woodlice

Question 17

What order includes spiders, daddy longlegs, mites, ticks, scorpions, and pseudoscorpions?

Answer 17

Arachnida

Question 18

What are arachnid’s respiratory structures made up of thin, flat folds of tissue arranged like book pages?

Answer 18

Book lungs

Question 19

What are the appendages located below the eyes of most arachnids used for seizing and crushing prey?

Answer 19

Chelicerae

Question 20

What are the appendages that assist the chelicerae in guiding food to the mouth?

Answer 20

Pedipalps

Question 21

What are the two groups of spiders?

Answer 21

True spiders and Mygalomorphs

Question 22

What spider has a dark violin-shaped marking on its brown cephalothorax?

Answer 22

Brown recluse

Question 23

What spider is known for its characteristic red or orange hourglass-shaped marking on the underside of its abdomen?

Answer 23

Black widow

Question 24

What arachnid is also called a harvestman?

Answer 24

Daddy longlegs

Question 25

What camouflaged arachnid has no stinger?

Answer 25

Pseudoscorpion

Question 26

What is a disease commonly transmitted by ticks?

Answer 26

Lyme disease

Question 27

What skin diseases come from mites?

Answer 27

Scabies and mange

Question 28

What group of arthropod is in the class Chilopoda?

Answer 28

Centipede

Question 29

What arthropod has a rounded body with two pairs of jointed appendages per abdominal segment?

Answer 29

Millipede

Question 30

What is the scientific term for segmented worms?

Answer 30

Annelids

Question 31

What is the common name for Platyhelminths?

Answer 31

Flatworms

Question 32

What arthropods are the most abundant animals?

Answer 32

Nematodes (roundworms)

Question 33

What is the common name for the order that contains clams, oysters, snails, slugs, and octopuses?

Answer 33

Mollusks

Question 34

What is the group of aquatic mollusks that includes clams, oysters, mussels, and similar species?

Answer 34

Bivalves

Question 35

What group of mollusk has a name that means "stomach foot"?

Answer 35

Gastropods

Question 36

What mollusks have the head and foot combined into one structure?

Answer 36

Cephalopods

Question 37

What group of marine animals includes starfish, sea urchins, sand dollars, and sea cucumbers?

Answer 37

Echinoderms

Question 38

What is the group of arthropods that include jellyfish, sea anemones,j and corals?

Answer 38

Coelenterates

Question 39

What are the only multicellular animal without a nervous system?

Answer 39

Sponges